A. On a global basis, protists are particularly important components of which of the following habitats?
- marine
- freshwater
- within the bodies of other organisms
- damp soil
B. Kelps are brown algae that grow in the ocean. The main importance of the kelps in marine habitats is/are
- they produce most of the biomass in the open ocean
- they produce most of the oxygen in the atmosphere
- they provide food and shelter in cool coastal ecosystems
- they are the closest relatives of the land plants
- they lack chlorophyll, therefore they are not green in color
C. Protists are ecologically and evolutionarily significant. Which of the following is NOT true?
- multicellular kingdoms evolved from protists
- photosynthetic protists are major producer organisms globally
- protists are not parasitic
- protists are important decomposer organisms in many ecosystems
- many protists have highly differentiated bodies, even producing tissues
D. According to current phylogenetic hypotheses, the Protista
- are a monophyletic group
- are not monophyletic group
- obtained their chloroplasts through endosymbiosis of a green algal cell
- obtained their chloroplasts in two independent endosymbiotic events
E. Phyla, or divisions, of photosynthetic protista differ from each other in all EXCEPT which of the following features:
- type of flagella
- types of chlorophyll
- types of food storage chemicals
- types of cell wall construction
- types of complex gametangia produced
F. If you found a green, photosynthetic, multicellular organism and you had only one characteristic that you could look for to determine whether it was a plant (Kingdom Plantae) instead of a protist (Kingdom Protista), what one feature would be the most definitive plant characteristic?
- presence of chlorophylls a and b
- presence of a cellulose wall
- presence of an embryo
- presence of starch
- absence of flagella
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Answers: A1, B3, C3, D2, E5, F3
modified 1/24/04